These QED disposable Earplugs have an attenuation of SNR30, H31, M26 and L24, for PPE protection against noise. Corded for convenience, they can be hung around the neck when not required and reinserted when needed. These Earplugs are detectable, so that they can be traced with a metal detector if accidentally lost; and the tree shape design gives a snug fit that stays in place.